Good but not great.
The sound is louder with these, at least from my tv, than other wireless fm headphones I have purchased but you do still get a noticeable hiss unless you set the volume around low to medium on the headphones and then turn up the tv or other audio source volume.
They turn off after about a minute or so of no audio being fed to them and the batteries can be charged inside the headphones via a cable that connects to the main unit.
The audio is loud enough that you can eliminate the hiss and still have loud audio and although I am fussy about hiss, you cant notice hiss when watching something unless volume is full and its a silent scene. I just turned the headphones down a bit and use the tv volume to control the audio level and that way I don't get the hiss.
They are comfortable and easy to use. The controls are inset a bit into the headphones so take a few uses to get used to, and can be a bit fiddley at first but they work and do what they should.
You can choose one of two audio channels to help combat interference. I thought I had interference as the audio would cut out and then be back on but I changed my tv audio settings to output standard audio instead of digital and it was fine so if you have a similar issue try checking the settings of whatever the base unit is plugged into.
Overall a good buy, and worth a purchase, clear audio and comfortable to wear for hours at a time. The ear pieces do make a squeak sound if you move your head a lot but thats not really an issue unless you plan to exercise or dance etc with these on.
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